2WO6空心納米花,并對(duì)其結(jié)構(gòu)和形貌進(jìn)行了X射線衍射、掃描電子顯微鏡、透射電子顯微鏡、熒光光譜和紫外可見(jiàn)漫反射譜表征。結(jié)果表明：PVP對(duì)Bi2WO6空心納米花的形成起到關(guān)鍵作用。在未添加PVP時(shí),鎢酸鉍呈現(xiàn)出實(shí)心的納米片狀堆疊的結(jié)構(gòu),僅在納米片的表面垂直生長(zhǎng)少量小片。而隨著PVP的量增多,表面的鎢酸鉍納米片發(fā)生劈裂,垂直生長(zhǎng)的納米片數(shù)量增多,以至最終形成了空心的納米花狀結(jié)構(gòu)。同時(shí),鎢酸鉍的晶粒尺寸隨著PVP含量的增加呈現(xiàn)出先減小再增大的趨勢(shì)?；赑VP對(duì)其比表面積和吸附能力的改善,這種空心的鎢酸鉍納米花展現(xiàn)出良好的光催化性能。在35W金鹵燈模擬的可見(jiàn)光照射下,3小時(shí)內(nèi)對(duì)羅丹明B的降解率達(dá)到了47%。熒光光譜分析表明PVP輔助水熱的鎢酸鉍納米花也具有更高的載流子遷移率。"/>

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PVP輔助水熱合成Bi2WO6納米花及其光催化活性探究
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浙江大學(xué),浙江大學(xué),浙江大學(xué),浙江大學(xué),浙江大學(xué)

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國(guó)家高技術(shù)研究發(fā)展計(jì)劃（863計(jì)劃）(No. 2015AA034701)


PVP assisted hydrothermal synthesis of Bi2WO6 nanoflowers and their photocatalytic activity
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Department of Materials Science and Engineering of Zhejiang University,Hangzhou PR China,Department of Materials Science and Engineering of Zhejiang University,Hangzhou PR China;Zhejiang-California International NanoSystems Institute;China,Department of Materials Science and Engineering of Zhejiang University,Hangzhou PR China,Department of Materials Science and Engineering of Zhejiang University,Hangzhou PR China,Department of Materials Science and Engineering of Zhejiang University,Hangzhou PR China

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The National High Technology Research and Development Program of China (863 Program) (No. 2015AA034701)

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    摘要:

    本文成功利用PVP(聚乙烯吡咯烷酮)輔助水熱技術(shù)合成了Bi2WO6空心納米花,并對(duì)其結(jié)構(gòu)和形貌進(jìn)行了X射線衍射、掃描電子顯微鏡、透射電子顯微鏡、熒光光譜和紫外可見(jiàn)漫反射譜表征。結(jié)果表明：PVP對(duì)Bi2WO6空心納米花的形成起到關(guān)鍵作用。在未添加PVP時(shí),鎢酸鉍呈現(xiàn)出實(shí)心的納米片狀堆疊的結(jié)構(gòu),僅在納米片的表面垂直生長(zhǎng)少量小片。而隨著PVP的量增多,表面的鎢酸鉍納米片發(fā)生劈裂,垂直生長(zhǎng)的納米片數(shù)量增多,以至最終形成了空心的納米花狀結(jié)構(gòu)。同時(shí),鎢酸鉍的晶粒尺寸隨著PVP含量的增加呈現(xiàn)出先減小再增大的趨勢(shì)?；赑VP對(duì)其比表面積和吸附能力的改善,這種空心的鎢酸鉍納米花展現(xiàn)出良好的光催化性能。在35W金鹵燈模擬的可見(jiàn)光照射下,3小時(shí)內(nèi)對(duì)羅丹明B的降解率達(dá)到了47%。熒光光譜分析表明PVP輔助水熱的鎢酸鉍納米花也具有更高的載流子遷移率。

    Abstract:

    hollow Bi2WO6 nanoflowers have been successfully synthesized by using PVP modified hydrothermal method, and their morphology and structure are characterized by XRD, SEM, TEM, PL and UV-vis analysis. A series of controlling experiments indicate PVP play an important role in the formation of the hollow hierarchical structure. Without adding PVP, the morphology of Bi2WO6 is the solid nanoplate. When a small amount of PVP is added, the surface of Bi2WO6 splits, and the hollow flowerlike morphology forms. The crystalline size of Bi2WO6 also slightly increases with PVP contents increasing. The as-prepared PVP-Bi2WO6 shows the improved photocatalytic activity under visible light irradiation. After investigated by PL spectra, the emission intensity of PVP assisted Bi2WO6 is weaker than that of pure PVP, which means the high-mobility of PVP-Bi2WO6 is obtained. PVP assisted Bi2WO6 nanoflower can be potentially used for practical waste water treatments.

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李文琪,丁新更,任春溶,巫華婷,楊輝. PVP輔助水熱合成Bi2WO6納米花及其光催化活性探究[J].稀有金屬材料與工程,2018,47(S2):167~170.[Wenqi Li, Xingeng Ding, Chunrong Ren, Huating Wu, Hui Yang. PVP assisted hydrothermal synthesis of Bi2WO6 nanoflowers and their photocatalytic activity[J]. Rare Metal Materials and Engineering,2018,47(S2):167~170.]
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  • 收稿日期:2017-12-04
  • 最后修改日期:2017-12-04
  • 錄用日期:2018-02-01
  • 在線發(fā)布日期: 2018-11-01
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